List the three primary functions of root.

Mention four purposes for which the plants need water.

List three main characteristics of the roots that enable them to draw water from the soil.

Write true or false.

(i) Diffusion is the movement of molecules from a region of their lower concentration to that of a higher one.

(ii) Osmosis includes diffusion, but not vice versa.

(iii) Osmosis is unidirectional.

(iv) Exosmosis may cause bursting of a cell.

(v) Semi-permeable membrane prevents the passage of the solute molecules.

(vi) In an experiment on osmosis, if external pressure is applied on a dilute solution, less water will pass into the concentrated solution.